EP0927619A1 - Système couleur liquide pour utilisation en rotomoulage et son procédé d'utilisation - Google Patents
Système couleur liquide pour utilisation en rotomoulage et son procédé d'utilisation Download PDFInfo
- Publication number
- EP0927619A1 EP0927619A1 EP97123035A EP97123035A EP0927619A1 EP 0927619 A1 EP0927619 A1 EP 0927619A1 EP 97123035 A EP97123035 A EP 97123035A EP 97123035 A EP97123035 A EP 97123035A EP 0927619 A1 EP0927619 A1 EP 0927619A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- color system
- liquid color
- weight
- set forth
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001175 rotational moulding Methods 0.000 title claims abstract description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 30
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000003086 colorant Substances 0.000 claims abstract description 22
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 21
- 239000002952 polymeric resin Substances 0.000 claims abstract description 20
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000008020 evaporation Effects 0.000 claims abstract description 9
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 235000011187 glycerol Nutrition 0.000 claims abstract description 5
- 238000010998 test method Methods 0.000 claims abstract description 4
- 239000000049 pigment Substances 0.000 claims description 10
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- -1 antistats Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 239000004609 Impact Modifier Substances 0.000 claims description 3
- 239000004599 antimicrobial Substances 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000012760 heat stabilizer Substances 0.000 claims description 3
- 239000001023 inorganic pigment Substances 0.000 claims description 3
- 239000004611 light stabiliser Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 239000012860 organic pigment Substances 0.000 claims description 3
- 239000012779 reinforcing material Substances 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 2
- 239000000975 dye Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 9
- 239000000047 product Substances 0.000 description 6
- 229920002125 Sokalan® Polymers 0.000 description 5
- 238000013019 agitation Methods 0.000 description 4
- 159000000000 sodium salts Chemical class 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 239000004584 polyacrylic acid Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- DNEHKUCSURWDGO-UHFFFAOYSA-N aluminum sodium Chemical compound [Na].[Al] DNEHKUCSURWDGO-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- FRLJSGOEGLARCA-UHFFFAOYSA-N cadmium sulfide Chemical class [S-2].[Cd+2] FRLJSGOEGLARCA-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- UREBDLICKHMUKA-CXSFZGCWSA-N dexamethasone Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@]2(F)[C@@H]1[C@@H]1C[C@@H](C)[C@@](C(=O)CO)(O)[C@@]1(C)C[C@@H]2O UREBDLICKHMUKA-CXSFZGCWSA-N 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 210000000416 exudates and transudate Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003385 sodium Chemical class 0.000 description 1
- HIEHAIZHJZLEPQ-UHFFFAOYSA-M sodium;naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 HIEHAIZHJZLEPQ-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000992 solvent dye Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/2053—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the additives only being premixed with a liquid phase
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0041—Optical brightening agents, organic pigments
Definitions
- the present invention concerns a liquid colorant. More particularly, the invention concerns a liquid colorant for use in rotational molding and a method for use of such liquid colorant.
- Rotational molding is used for the production of hollow containers and other products of larger size and complicated structure which cannot be readily molded by other conventional molding techniques such as injection molding and sheet thermoforming.
- Such structures include, for example, gasoline tanks, casks, storage tanks and toys.
- Rotational molding includes the steps of feeding a polymeric resin powder to a mold, heating the mold from the exterior while rotating the mold and melting the powder, thereby forming a molten synthetic resin layer within the mold, then cooling the mold to solidify the polymeric resin, and finally separating the mold from the molded product.
- the polymeric resin powder may be mixed with pigments so as to impart a color to the molded product.
- pigments are added to the polymeric resin powder in the form of a dry powder or solids.
- these pigment powders can present handling and mixing problems. Specifically, such pigments can form undesirable dust or they can mix unevenly with the polymeric resins.
- the invention provides a new and improved liquid colorant or liquid color system that is designed specifically for use in rotational molding.
- the liquid color system mixes uniformly with the polymeric powder resin being utilized and it does not form lumps or other unwanted agglomerates. Also, the liquid color system of the present invention does not produce any exudation of colorants or carrier nor does it produce any undesirable volatile vapors during the rotational molding operation.
- the present invention also provides a method of rotational molding using a liquid color system.
- the liquid color system comprises from about 10% to about 75% by weight carrier, from about 0% to about 15% by weight water, from about .01% to about 10% by weight dispersant and from about 10% to about 80% by weight colorant, wherein said carrier comprises a material selected from the group consisting of propylene glycol, ethylene glycol, diethylene glycol, tri(ethylene glycol), glycerin and mixtures of two or more thereof.
- the invention also provides a unique method of using the present liquid color system.
- This method includes the step of mixing the liquid color system in a distributive mixer along with the polymeric resin powder that is intended to be rotationally molded.
- the mixture of the polymeric resin powder and liquid color system can then be processed in a rotational molding machine. Specifically, the mixture is fed to a heated rotating mold, the mixture forming a colored molten resin layer within the mold which upon cooling solidifies and upon separating from the mold yields a colored molded product.
- the liquid color system of the present invention comprises a carrier, water, a dispersant and a colorant.
- the liquid color system of the present invention is specifically made for use in rotational molding and it provides several distinct advantages. Specifically, the liquid color system of the present invention can be uniformly mixed with the polymeric resin powder that is being used without the formation of agglomerates or other undesirable lumps. Also, the liquid color system of the present invention can be used without the formation of undesirable exudates or films on the surfaces of the parts formed thereby facilitating the easy release of the formed part from the mold.
- the carrier comprises a material selected from the group consisting of propylene glycol, ethylene glycol, diethylene glycol, tri(ethylene glycol), glycerin and mixtures of two or more of these materials.
- a preferred carrier is propylene glycol.
- the propylene glycol that is employed is preferably a food grade product. An example of such a product is propylene glycol sold by the Avatar Corporation.
- the dispersant that is utilized in the liquid color system is dependent upon the type of colorant and carrier being used.
- the dispersant is soluble in the carrier and it associates strongly with the particles of colorant as they are separated from each other during mixing, thereby preventing the particles from reattaching to each other during storage and use.
- suitable dispersants include polyvinylpyrrolidone (e.g., Sokalan HP50 from BASF), sodium salt of polyacrylic acid (molar mass from 1,200-250,000), sodium/iron salt of lignosulfonic acid, sodium salt of condensed naphthalenesulfonic acid, sodium naphthalene sulfonate and sodium salt of polymeric carboxylic acid.
- colorant when used herein denotes any conventional inorganic or organic pigment, organic dyestuff or carbon black.
- suitable inorganic pigments, organic pigments and dyestuffs useful in component (II) are described, for example, in Kirk-Othmer Encyclopedia of Chemical Technology , Third Edition, Vol. 6, pages 597-617, which is incorporated by reference herein; examples are:
- the water that is employed in the liquid color system is a deionized water.
- liquid color system Various conventional additives or mixtures thereof may also be included in the liquid color system such as, for example, lubricants, antistats, impact modifiers, antimicrobials, light stabilizers, filler/reinforcing materials (e.g., CaCO 3 ), heat stabilizers, release agents, rheological control agents such as clay, etc.
- lubricants for example, lubricants, antistats, impact modifiers, antimicrobials, light stabilizers, filler/reinforcing materials (e.g., CaCO 3 ), heat stabilizers, release agents, rheological control agents such as clay, etc.
- the liquid color system displays an evaporation rate of from about 0.01 to about 0.36, and preferably a rate of 0.015 to about 0.20.
- liquid color system of the present invention may be used in conjunction with various polymeric resin powders.
- powders include, for example, polymers and copolymers of olefins such as polypropylene, EVA and polyethylene materials such as LDPE, HDPE and LLDPE and engineered resins such as ABS, PPO and polyamides like Nylon, Nylon 66, Nylon 11 or Nylon 12, and mixtures of any of the foregoing.
- the liquid color system of the present invention is preferably mixed with the polymeric resin powder using a distributive mixer.
- a distributive mixer This differs from prior art methods where dry or powdered colorants or pigments are mixed with the polymeric resin powder using a rotating drum.
- suitable distributive mixers include Henschel mixers (horizontal or vertical), ribbon blenders, paddle blenders and rotary blade mixers such as high intensity continuous blenders manufactured by Munson Machinery, Inc. of Utica, New York.
- the mixture of polymeric resin powder and liquid color system comprises from about .05% to about 4% by weight liquid color system.
- the liquid color system of the present invention may be used in any conventional rotational molding machine to produce parts of various configurations.
- the method of using the liquid color system of the present invention includes the steps of mixing the liquid color system in a distributive mixer along with the polymeric resin powder that is to be molded, feeding the mixture into a rotating mold heated to a temperature of from about 350°F to about 650°F, allowing the polymeric resin powder to solidify and form a part, and removing the formed part from the mold.
- the above components are charged into a mixing vessel, which is equipped with a Cowles mixing blade.
- the blade is concentrically centered in the mixing container, and the depth of the blade from the bottom of the mixing container is about one-half the blade diameter.
- the sodium salt of polyacrylic acid and propylene glycol are added first, under mild agitation.
- the titanium dioxide and clay are then added gradually under mild agitation.
- the agitation is increased until the blade tip speed is at least 5,500 ft/min.
- the agitation is continued for at least five minutes, and a measurement of dispersion quality is made, typically with a Hegman grind gauge, according to ASTM 1210-79. A Hegman reading of 7.0 or above is satisfactory.
- Example II The mixture of Example II is fed into a Ferry Corp. rotational molding machine at a temperature of about 500°F and colored plastic drums are produced.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/684,437 US5759472A (en) | 1996-07-17 | 1996-07-17 | Liquid color system for use in rotational molding and method of using the same |
| EP97123035A EP0927619A1 (fr) | 1996-07-17 | 1997-12-31 | Système couleur liquide pour utilisation en rotomoulage et son procédé d'utilisation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/684,437 US5759472A (en) | 1996-07-17 | 1996-07-17 | Liquid color system for use in rotational molding and method of using the same |
| EP97123035A EP0927619A1 (fr) | 1996-07-17 | 1997-12-31 | Système couleur liquide pour utilisation en rotomoulage et son procédé d'utilisation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0927619A1 true EP0927619A1 (fr) | 1999-07-07 |
Family
ID=26146032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97123035A Withdrawn EP0927619A1 (fr) | 1996-07-17 | 1997-12-31 | Système couleur liquide pour utilisation en rotomoulage et son procédé d'utilisation |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5759472A (fr) |
| EP (1) | EP0927619A1 (fr) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69921957T2 (de) | 1999-02-17 | 2006-03-02 | Ferro Corp., Cleveland | Verfahren zur Herstellung eines gefärbten Polymerharzpulvers für eine Verwendung im Rotationgiessverfahren |
| US6649122B1 (en) | 1999-04-08 | 2003-11-18 | Larry L. Lough | Aqueous colorant system for incorporation into plastics |
| KR100469696B1 (ko) * | 2002-06-10 | 2005-02-02 | 엘지전자 주식회사 | 플라즈마 디스플레이 패널 |
| US20050129901A1 (en) * | 2003-12-12 | 2005-06-16 | Mity-Lite, Inc. | Molded article with adhesion-resistant reinforcing member and method |
| US20050129921A1 (en) * | 2003-12-12 | 2005-06-16 | Laws R. D. | Molded article with foam-encased reinforcing member |
| US7635114B2 (en) * | 2002-06-18 | 2009-12-22 | Mfs, Llc | Rotationally molded, reinforced decorative fence post and method of making same |
| US20070275229A1 (en) * | 2003-12-12 | 2007-11-29 | Laws R D | Molded article with foam-encased adhesion-resistant reinforcing member and method |
| US7273571B2 (en) * | 2004-02-25 | 2007-09-25 | Mfs, Llc | Molded table and its method of manufacture |
| US8686082B2 (en) | 2006-03-24 | 2014-04-01 | Applied Nanotech Holdings, Inc. | Nylon based composites |
| US20070225426A1 (en) * | 2006-03-24 | 2007-09-27 | Nano-Proprietary, Inc. | Nylon 11/Filler/Modifier Composites |
| DE102008041338A1 (de) | 2008-08-19 | 2010-02-25 | Evonik Röhm Gmbh | Einfärbeprozess für Poly(meth)acrylate mit Flüssigfarben auf Wasserbasis und Flüssigfarben auf Wasserbasis |
| US20110100270A1 (en) * | 2009-04-28 | 2011-05-05 | Tom Atkins | Aluminum table with flat upper surface |
| US8307769B1 (en) | 2009-07-31 | 2012-11-13 | Mity-Lite, Inc. | Plastic and plywood laminate table with drop corner |
| US20130096244A1 (en) | 2010-07-09 | 2013-04-18 | Evonik Roehm Gmbh | Water-based liquid color containing thermostable dispersion additives for the coloring poly(meth)acrylates |
| BR112013017976A2 (pt) | 2011-01-14 | 2020-10-27 | Color Matrix Group Inc. | misturador de cores alinhado |
| US8550012B2 (en) | 2011-10-27 | 2013-10-08 | Mity-Lite, Inc. | Leg locking and folding mechanism for folding table |
| US8671850B2 (en) | 2011-10-27 | 2014-03-18 | Mity-Lite, Inc. | Convertible tabletop with pivotal modesty panel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982000652A1 (fr) * | 1980-08-26 | 1982-03-04 | Organics Corp American | Colorant liquide et son procede d'utilisation |
| SU1062226A1 (ru) * | 1982-03-25 | 1983-12-23 | Всесоюзный научно-исследовательский институт игрушки | Полимерна композици |
| EP0156458A1 (fr) * | 1984-01-27 | 1985-10-02 | Nippon Petrochemicals Company Limited | Composition de copolymère d'éthylène pour moulage rotatif |
| US5116547A (en) * | 1989-07-30 | 1992-05-26 | Mitsubishi Gas Chemical Co. | Method of coloring polycarbonate extruded or molded products for optical members |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2304978C2 (de) * | 1973-02-01 | 1974-12-12 | Basf Ag, 6700 Ludwigshafen | Fließfähige, wäßrige Pigmentfarbstoffzubereitungen |
| US4668461A (en) * | 1980-10-09 | 1987-05-26 | Phillips Petroleum Company | Polymers and rotationally molding same |
| US4909852A (en) * | 1985-02-11 | 1990-03-20 | Atkinson George K | Treatment of titanium dioxide and other pigments to improve dispersibility |
| US4738815A (en) * | 1986-01-27 | 1988-04-19 | Peter Friesen | Rotational molding machine and method of molding |
| US5157067A (en) * | 1990-06-27 | 1992-10-20 | Ferro Corporation | Liquid colorant/additive concentrate for incorporation into plastics |
-
1996
- 1996-07-17 US US08/684,437 patent/US5759472A/en not_active Expired - Lifetime
-
1997
- 1997-12-31 EP EP97123035A patent/EP0927619A1/fr not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982000652A1 (fr) * | 1980-08-26 | 1982-03-04 | Organics Corp American | Colorant liquide et son procede d'utilisation |
| SU1062226A1 (ru) * | 1982-03-25 | 1983-12-23 | Всесоюзный научно-исследовательский институт игрушки | Полимерна композици |
| EP0156458A1 (fr) * | 1984-01-27 | 1985-10-02 | Nippon Petrochemicals Company Limited | Composition de copolymère d'éthylène pour moulage rotatif |
| US5116547A (en) * | 1989-07-30 | 1992-05-26 | Mitsubishi Gas Chemical Co. | Method of coloring polycarbonate extruded or molded products for optical members |
Non-Patent Citations (1)
| Title |
|---|
| DATABASE WPI Section Ch Week 8436, Derwent World Patents Index; Class A14, AN 84-223716, XP002068772 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US5759472A (en) | 1998-06-02 |
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